I stared in shock at the back wall of my closet, unable to fully understand what I was seeing.

There was a hole neatly drilled through the wall, behind where an ugly, never-worn sweater once hung. It couldn't have been seen from my side, but if the sweater were to be pushed aside from the other side of the wall, it would offer a clear view into my bedroom.

A clear view, from my step-brother Kyle's bedroom.

The hole itself was more than large enough to offer him a view and accommodate his finger to hold the sweater, and I wondered how much he had seen that way.

I had no way of knowing if it had been there when I left for college just a few short months ago, but something told me that it definitely had been. And I had a pretty good idea of why it was there in the first place. I thought about all of the times I had changed in my bedroom; about the times that I fingered myself, legs spread and quivering when I came; about the time that Glen Foster snuck into my room when everyone else was asleep, and I sucked him off until he came on my face and tits.

All the intimate moments of my life, visible through that damned hole.

The gears in my head started turning. I could tell our parents- his dad would kill him for putting a hole in the wall; he might care about the privacy issue, too, but the damage to the wall was a sure thing. But I wanted something more- I wanted revenge.

And I knew exactly how to go about it, because I knew him. He didn't know that I was back, and he'd be out with his girlfriend until long after Mom and Dad were asleep.

Assuming she still wasn't putting out (with thin walls, there are no secrets), he'd come home and watch porn on his laptop until about midnight, masturbate, and then go to sleep.

But not tonight.

Tonight, I would interrupt him. I'd wait for the tell-tale sounds that he was close, then yell at him through the hole before he could finish. It wasn't anything that I hadn't heard before, and I certainly wouldn't have to look. It really seemed almost poetic, in a way, to use the same hole that he had drilled out to spy on me to get revenge on him.

I knew that guys hated being interrupted before they could finish, and hoped that his balls would turn the brightest shade of blue.

The hours stretched on, until I finally heard Kyle's car pull into the driveway. I was nearly giddy thinking about my revenge, and imagining the look on his face when he realized that he had been caught- that I knew about the hole in the wall. I hid in my old closet, holding my breath as he made his way through the house and to his own room.

Now I would see if I was right; if his girlfriend was still the sweet, innocent little thing that I remembered her to be.

The moans and grunts, barely audible through his speakers, told me that she was. No wonder he was perving on me, if he still hadn't gotten anywhere with her.

I suppressed an evil cackle as I heard him begin. It started with the soft rustle of clothing hitting the floor, followed by the familiar sound of flesh against flesh. I could hear his balls slapping against his skin; as far as he knew, he had no reason to even try to be careful with our parent's bedroom on the other side of the house.

He started stoking himself faster, and I knew he would be finishing any moment. I pressed my lips against the hole, and took a deep breath, ready to interrupt his private moment in the same way he intruded on mine.

"Oh, fuck, Ally," he moaned softly.

What the fuck? I thought to myself. My name. I couldn't be sure if I had really heard what I thought I heard. Did he really just moan my name as he was about to cum?

We had always been close- we thought of each other as brother and sister, rather than step-siblings. But this was something different entirely.

"God, Ally," he said again, as though answering my question.

I could hear the urgency in his voice, and his strokes had gotten rapid and shallow. He was very close now, and he was thinking of me.

Curiosity had always been my downfall, and I gave into it then. I had to look.

I moved slowly, afraid that he would somehow hear me; it went from a simple prank to full-blown voyeurism the moment I pressed my eye to the hole.

There, in the pale light of his laptop screen, I could see him furiously stroking his shaft. His eyes were closed, and his head was leaned back. He was big; I'd had bigger, but he was still impressive.

His balls were full and heavy, and they danced against his thighs as his fist moved over his thick shaft, from his base to the swollen tip. I knew that I should have looked away then, but I just couldn't.

I watched, fascinated- and, more than I would care to admit, a little bit aroused.

And then, he came. His cock erupted in a geyser of cum, which sailed into the air in a high arc before landing on his chest and stomach. I couldn't tell if it had just been a while or if he always came buckets, but the sheer volume was incredible.

And he was thinking of me when he did it. My mind was swimming, and I barely remembered making my way to the bed. There was no way I was going to sleep any time soon; what I had just seen was playing over and over again in my mind.

I couldn't help myself; I slid my fingers over my sopping-wet pussy, and pressed against my clit in tight circles. I came quickly, as though the orgasm had just been waiting for permission, and it took every bit of self-control to hold the moan when I came.

Only when I was satisfied did I fall asleep.

The moment I fell asleep, I was thrust into raw, sexual dreams. There was no plot to them; it was more a series of short scenes and erotic images. I saw Kyle, pressing his thick cock against my lips, which I dutifully opened to take him in.

I saw my tits shaking as he fucked me from behind, my ass high in the air and my body weight supported by my hands and knees. And I saw his cum, coating my body with thick, warm splatters of cream.

I woke up with start, wet from both sweat and arousal. Once again, it didn't take me very long to cum, and I quickly showered before making my way downstairs.

Kyle was the only one at the table, and he seemed surprised to see me. I couldn't look him in the eyes, and hoped he didn't notice that I was blushing.

"Hey, Ally!" he greeted me as he jumped out of his chair.

He was on me in seconds, and he pulled me into a tight hug. I was very aware of every inch of his body as he pressed it against mine, and my thoughts once again flashed to what I had seen the night before.

I couldn't help but think about his cock, and I was very aware of the fact that it was very, very close to me needy hole. When he pulled away, I nearly fell forward, just barely catching myself before I did. "I thought you weren't coming in until tonight?"

He sat at the table, and I took the chair opposite him. "I got in a little early- last night. I heard you come in, but I was already in bed," I lied.

A brief moment of panic flashed through his eyes, and he turned a shade whiter as the implication hit him. But I kept my face impassive, and he quickly relaxed.

We talked about my classes and his job, quickly catching up on each other's lives. Soon it was as though I had never left. We spent the day together, and with some effort I was able to keep the sexual thoughts about him from my mind.

But of course the day had to end, and it was soon time for us to part ways for the night. And most nights, that would have been the end of it. But tonight I had a plan. Although he didn't know it, he had given me a gift the night before.

The least I could do was return the favor. After all, he was obviously interested.